Electronics Forum | Thu May 23 03:10:43 EDT 2002 | ianchan
Hi mates, need your advise here. we have solderballs on a model due to neglect by stubborn folks to follow issued process control instructions. the post-reflow PCBA has solderballs stuck in the NC flux residue and is not in compliance to IPC-A-610
Electronics Forum | Tue Jun 04 20:34:28 EDT 2002 | russ
Jason, Excessive thermal ramp rates, misprints, improper pad design, paste type, placement pressure, all can cause solderballs. Do the pads on this board meet IPC 782 criterias? I have found that too much pad underneath component can cause this. A
Electronics Forum | Thu Jun 06 11:42:24 EDT 2002 | Brad Jakeway
What you are seeing on your gold fingers is referred to as flux spattering. This is a very commond problem with gold fingers if you have a zero flux spattering criteria for quality control. The key to eliminating this problem is in the reflow profi
Electronics Forum | Tue Jul 16 07:59:14 EDT 2002 | hany_khoga
Hello there: 1- I know someone who diluted expired solder paste, which obviously lost its tackiness using Isopropanol. The paste was expired by more than 6monthes but after dilution I saw by myself the paste has retrieved its tackiness. The amazing
Electronics Forum | Fri Sep 27 08:12:19 EDT 2002 | yngwie
Dear all, My customer is asking me to add chevron solder mask registration marks to their board design, drive fabrication capability study from their board vendor(s), and make sure tolerances are established correctly for copper traces and solder mas
Electronics Forum | Sat Nov 16 21:19:37 EST 2002 | MA/NY DDave
Hi, An interesting tread, Neat reading. Just pulled out a guide that was given at Nepcon West2000 entitled: Nepcon West 2000 Pick & Place Evaluation You might want to call them to get a copy of the report. As two or three others already pointed
Electronics Forum | Thu Jan 09 16:42:50 EST 2003 | russ
what are your grading criterias? All of these work pretty good but have differences in the "bells and whistles" I like the Air-Vac DRS24 (no exp. with the 22) because of the large under heater and thermo-couple control. but it is very slow and costl
Electronics Forum | Fri Jan 10 09:38:00 EST 2003 | pjc
Without knowing your boards and components its difficult to comment- beyond users of those mfgs. and models you mention commenting on performance, reliablity of the equipment and service & support from the mfg. As with any machine, its best to test d
Electronics Forum | Fri Feb 28 12:02:15 EST 2003 | MA/NY DDave
Hi You are right. I guess some of us missed this point in the way this on line dialog works. I like to put the specification that the PCB supplier must adhere to, on the Physical Print. The Physical print is often used by outgoing and incoming insp
Electronics Forum | Mon Mar 03 11:49:15 EST 2003 | msivigny
Hello marys, To determine the quality performance specification of your printers, dispensers or placement equipment, you must first know the operational accuracy and repeatability criteria from the equipment manufacturer. Only then can you determine
